Hi,
We're running a system with Kamailio running in front of Asterisk just handling registrations and forwarding everything else to Asterisk. But we're having an issue during hangup on incoming calls. If the initiator hangs up, the call completes successfully. But if one of our phones hangs up, the BYE message comes back with a 404 "Not Found" and the call doesn't hang up on the carrier side.
According to the carrier, it's because the IP in the contact on our ACK message goes to their audio IP while the header of our BYE points to their signaling IP.
ACK sip:[Kamailio Pub IP]:5060;line=sr--rkpsDAp6YAp6DIpZDZmZeI2ZYI26YIRVDcpsDIpsem* SIP/2.0 Via: SIP/2.0/UDP *[Carrier Signaling IP]*;branch=z9hG4bK2236.1402e7b4.2 Via: SIP/2.0/UDP *[Carrier Audio IP]*;received=*[Carrier Audio IP]* ;branch=z9hG4bK07a8bccb;rport=5060 Route: <sip:[Kamailio Pub IP];r2=on;lr=on;ftag=as67cef00d;nat=yes>,sip:10.120.0.1;line=sr--rkpsDthVDIhVDNh6Ogo6eKh6eAQs4LRflC2srQRflC2srGqAl-CAP6rZrZkGDmpGed2APtCvlx1 From: "+16014477389" <sip:6014477389@*[Carrier Audio IP]*>;tag=as67cef00d To: <sip:6016025063@*[Carrier Signaling IP]*>;tag=as643b40ca Contact: <sip:6014477389@*[Carrier Audio IP]*> Call-ID: 4aaefec90826a2a221f0af9500ad211b@*[Carrier Audio IP]* CSeq: 102 ACK User-Agent: packetrino Max-Forwards: 69 Content-Length: 0
BYE sip:6014477389@*[Carrier Signaling IP] *SIP/2.0 Via: SIP/2.0/UDP [Kamailio Pub IP];branch=z9hG4bK2236.fca983a45913fb510f97e781a85c7392.0 Via: SIP/2.0/UDP 10.120.0.1;branch=z9hG4bKsr-IqktV1L26BCx0jmwZeI2ZYI26YIRVDcpsDIpsem.-EF8-EtCZYmg6edIMehhA4A.AEzyuiZKfPKo7N-qAcWq6D-rsYc4Zp** Route: <sip:*[Carrier Signaling IP]*;lr=on> Max-Forwards: 69 From: <sip:6016025063@[Kamailio Pub IP]>;tag=as643b40ca To: "+16014477389" <sip:6014477389@*[Carrier Audio IP]*>;tag=as67cef00d Call-ID: 4aaefec90826a2a221f0af9500ad211b@*[Carrier Audio IP]* CSeq: 102 BYE User-Agent: Asterisk PBX 13.6.0 X-Asterisk-HangupCause: Normal Clearing X-Asterisk-HangupCauseCode: 16 Content-Length: 0
I'm thinking it's happening because their side isn't configured correctly to handle traffic coming back from a proxy, but in the meantime is there a way to rewrite the top of the BYE header to match the "audio IP" they're requesting it be sent to?
Thanks!